Aircraft maintenance specialist Staff Sgt. Dave Wakefield, Senior Amn Kurt Simmers and Tech. Sgt. Charles Pangelinan, of the 129th Maintenance Group at Moffett Federal Airfield, Calif., performs maintenance on a HH-60G Pave Hawk helicopter rotor blades during an Operation Readiness Exercise. (U.S. Air Force photo by Master Sgt. Dan Kacir) (RELEASED)